After evaluating what happened during Wednesday's severe storms, the National Weather Service's Norman Forecast Office said Thursday that it is confident more than one tornado hit the Oklahoma City metro area Wednesday.

The Oklahoma City-Moore tornado has been classified as a preliminary EF1 tornado. There is a possibility the preliminary status could be moved up to an EF2, but the NWS will need to review more information before changing the tornado's classification.

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An EF1 tornado is a tornado that is recorded between 86 and 100 miles per hour. An EF2 tornado is measured at 111-135 mph.

Most of the damage was caused by strong straight-line winds that reached greater than 80 mph.